Fly-brush for screen-doors.



W. L. JOHNSON.

FLY BRUSH FOR SCREEN DOORS.

APPLICATION FILED NOV. 24, 1908.

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Patented Aug. 31,1909.

uniran sricrrns PATENT oFn o WALTER L. JOHNSON, OF BATON, TERRITORY OFNEW MEXICO.

FLY-BRUSH FOR SCREEN-DOORS.

T 0 all whom it may concern:

Be it known that I, WALTER L. JOHNSON, a citizen of the United States,residing at Raton, in the county of Colfax and Territory of New Mexico,have invented new and useful Improvements in Fly-Brushes for Screen-Doors, of which the following is a specification.

This invention relates to screen door attachments and more particularlyto top and side brushes that are adapted to be agitated as the screendoor opens and closes so as to prevent flies from entering a dwelling aspersons make their entrance and eXit.

The invention has for one of its objects to improve and simplify theconstruction and operation of devices of this character so as to becomparatively simple and inexpensive to manufacture, reliable andefficient in use, and so designed as to be readily attached to anyordinary screen door.

Another object of the invention is the provision of a rotary brushadapted to be mounted adjacent the top of the door and which is providedwith a winding device whereby the brush will rotate as the screen dooropens, and which is also provided with a return spring for reversing therotation of the brush and at the same time moving the door closed.

A further object is the provision of a vertically disposed side brushwhich is agitated by the movement of the rotary brush through a crankconnection between the brushes.

With these objects in view and others, as will appear as the descriptionproceeds, the invention comprises the various novel features ofconstruction and arrangement of parts which will be more fully describedhereinafter and set forth with particularity in the claims appendedhereto.

In the accompanying drawing, which illustrates one embodiment of theinvention, Figure 1 is a fragmentary front elevation of the upperportion of a screen door and doorway. Fig. 2 is a horizontal section online 22, Fig. 1.

Similar reference characters are employed to designate correspondingparts throughout the views.

Referring to the drawing, A designates the frame of a doorway, and B,the frame of a screen door which is attached to the door frame byhinges 1. Mounted at the top of the door frame is a horizontal brush Ccomprising a rod 2 having its ends mounted in Specification of LettersPatent.

Application filed November 24, 1908.

Serial No. 4%,231.

bearings 3 and 4 secured to the door frame A. The pintle 5 of the brushis prevented from rotating in the bearing 3 and is connected with ahelical torsion spring 6 which serves to return the roller as the screendoor closes and this spring may be of sufficient strength as to serve asmeans for returning the screen door and holding the same closed.

The brush is provided with a crank 7 at the end that is supported in thebearing 4 for the purpose of operating a vertical brush D supported atthe side of the door frame, the said brush being connected with andsuspended from the crank 7. The lower end of the brush D has a rod 8that is loosely mounted in a guide 9 secured to the door frame, wherebythe lower end of the reciprocatory brush D is maintained in position. Onthe rod 2 of the rotary brush 0 is a winding drum 10 preferably locatedat the center, and winding on this drum is a cord 11 that has one endattached at 12, Fig. 2, to the screen door so that as the door opens,the cord will unwind and cause the horizontal brush to rotate, thespring during this movement being subjected to tension so as to returnthe screen door by rotating the brush in the opposite direction to causethe cord to wind on the drum 10. The cord passes over a guide pulley 13supported in a bracket 14 mounted on the top of the door frame. As therotary brush is actuated, the crank 7 imparts a vertical rcciprocatorymovement to the brush D and at the same time a back and forth horizontalmovement at the upper end, due to the fact that the crank moves in acircle. By thus agitating the brushes, the flies are prevented frompassing through the doorway as the screen door is opened.

From the foregoing description, taken in connection with theaccompanying drawing, the advantages of the construction and of themethod of operation will be readily apparent to those skilled in the artto which the invention appertains, and while I have described theprinciple of operation of the invention, together with the device whichI now consider to be the best embodiment thereof, I desire to have itunderstood that the device shown is merely illustrative, and

that such changes may be made when desired as are within the scope ofthe claims appended hereto.

Having thus described the invention, what I claim is 1. A device of theclass described compris- Patented, Aug. 31, 1909.

screen door and rotary brush for turning the latter in one direction asthe door opens, and means for reversing the rotation of the brush as thedoor closes.

4. An attachment for screen doors comprising a rotary brush, a helicaltorsion spring mounted in the brush or returning the same, a drum on thebrush, and a cord wound on the drum and connected with the screen doorfor rotating the brush as the door opens, said spring serving to reversethe brush and return the door.

5. An attachment for screen doors comprising a rotary brush, a helicaltorsion spring mounted in the brush for returning the same, a drum onthe brush, and a cord wound on the drum and connected with the screendoor for rotating the brush as the door opens, said spring serving'toreverse the brush and return the door, a reciprocatory brush, and acrank connection between the brushes for moving the reciprocatory brushby the rotary brush.

In testimony whereof I afiix my signature in presence of two witnesses.

WALTER L. JOHNSON.

